Some portable DVD players that run on batteries include the Philips 9-inch widescreen portable DVD player and Insignia's 9-inch widescreen portable DVD player. Other brands that make battery-powered portable DVD players include Sony, QFX and Naxa.
As of 2015, Philips' 9-inch widescreen portable DVD player is available in silver and black and can run on batteries for almost five hours. Insignia sells a 9-inch portable DVD player that can run up to four hours on battery power.
The Sony portable DVD player can last up to six hours if brightness adjusts to a low setting. QFX has a 7-inch portable DVD player that runs on four hours of battery power per use.
Naxa sells one of the biggest portable DVD players at 10 inches. However, this model only runs for up to three hours on batteries.